Krenke, A. N.
Ptichnikov, A. V.
Shvarts, E. A.
Petrov, I. K.
Article History
Received: 9 August 2021
Revised: 9 August 2021
Accepted: 9 August 2021
First Online: 30 December 2021
COMPLIANCE WITH ETHICAL STANDARDS
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: The authors declare that they have no conflict of interest.